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Permanent URI for this collectionhttps://hdl.handle.net/11443/932

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Author: search.filters.author.Uysal, MujdatHas files: Yes

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    The Evaluation of Endothelin-1 and Endothelin Receptor Type A Gene Polymorphisms in Patients with Vitiligo
    (WOLTERS KLUWER MEDKNOW PUBLICATIONS, 2016-01-01) Bingul, Ilknur; Aydingoz, Ikbal Esen; Vural, Pervin; Dogru-Abbasoglu, Semra; Uysal, Mujdat
    Background: Endothelin-1 (EDNi) and EDN receptor type A (EDNRA) are implicated in melanocyte functions. Aim and Objectives: This study examines the role of EDN1 (G5665T and T-1370G) and EDNRA (C + 70G and G-231A) polymorphisms as a risk factor for vitiligo, and evaluates the relationship between genotypes and clinical characteristics of vitiligo patients. Materials and Methods: We analyzed genotype/alele distributions of EDN1 and EDNRA polymorphisms in 100 patients with vitiligo and 185 healthy controls by real-time polymerase chain reaction. Results: There was no notable risk for vitiligo afflicted by studied polymorphisms. However, the presence of EDNRA + 70 variant G allele was found to be related with decreased risk for development of generalized type of vitiligo (odds ratio {[}OR]: 0.42, 95\% confidence interval {[}CI] = 0.21-0.86, Por = 0.03) and showed protective effect against associated diseases seen in vitiligo (OR: 0.49, 95\% CI = 0.27-0.88, p(corr) = 0.034). Haplotype analysis demonstrated a strong (disequilibrium coefficient = 0.73, r(2) = 0.405) linkage disequilibrium between EDN1 G5665T and T-1370G polymorphisms. The EDN1 5665/-1330 TT haplotype was over represented significantly in controls than in patients (P = 0.04). Conclusion: The studied polymorphisms do not seem to be a major risk for vitiligo. Haplotype analysis denoting protective effects against vitiligo may indicate an indirect interaction in the course of vitiligo. In addition, EDNRA + 70 polymorphism is protective against generalized type of vitiligo and associated diseases.
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    VITAMIN D DEFICIENCY DID NOT AUGMENT THE PROGRESSION OF HIGH-FRUCTOSE-INDUCED NONALCOHOLIC FATTY LIVER DISEASE IN RATS
    (ISTANBUL UNIV, FAC MEDICINE, PUBL OFF, 2021-01-01) Bingul, Ilknur; Kucukgergin, Canan; Aydin, Abdurrahman Fatih; Ekici, Isin Dogan; Abbasoglu, Semra Dogru; Uysal, Mujdat
    Objective: Vitamin D has antioxidant, anti-inflammatory and antiglycation activities, and hepatoprotective potential. There is a relationship between vitamin D deficiency (VDD) and the severity of liver disorders. VDD has been proposed to contribute to the progression of nonalcoholic fatty liver disease (NAFLD). However, experimental results are not clear. Therefore, in this study, the effects of a VDD diet on high fructose (HFr) drinking-induced NAFLD was evaluated. Material and Method: Male Wistar rats were divided into four groups as control, HFr, VDD+HFr, and VDD. Control and HFr groups were fed a control diet, and other groups with a VDD-diet for 12 weeks. HFr (30\%